I would like to use BIBM to create a dual boot system with Ubuntu and Windows 10 preview. I'll be installing both from scratch to an unpartitioned drive.

Is there any FAQ on BIBM and Windows 10? I checked the Knowledge Base and didn't see anything beyond Windows 8What is the recommended order of installation? Are there any caveats using BIBM with Windows 10, or is it essentially the same as Windows 8 as far as BIBM is concerned?

I would like to use BIBM to create a dual boot system with Ubuntu and
Windows 10 preview. I'll be installing both from scratch to an
unpartitioned drive.

Is there any FAQ on BIBM and Windows 10? I checked the Knowledge Base and
didn't see anything beyond Windows 8
What is the recommended order of installation?
Are there any caveats using BIBM with Windows 10, or is it essentially the
same as Windows 8 as far as BIBM is concerned?

After completing the install of Ubuntu, the system rebooted directly to Ubuntu, bypassing BIBM.I then re-installed BIBM and added Ubuntu to the boot menu. I selected the Linux partition and the Root volume in the boot menu options for Ubuntu.

When I boot, the boot menu shows Ubuntu, but it says the volume is not bootable.

After completing the install of Ubuntu, the system rebooted directly to
Ubuntu, bypassing BIBM.
I then re-installed BIBM and added Ubuntu to the boot menu. I selected the
Linux partition and the Root volume in the boot menu options for Ubuntu.

When I boot, the boot menu shows Ubuntu, but it says the volume is not
bootable.

That would be caused by installing the boot loader (Grub2) to the MBR during the Ubuntu install, which is the default action for the Ubuntu installer. To avoid this, you need to tell the installer to install Grub2 to the Ubuntu root partition instead . This is covered in the Ubuntu install procedure in this KB article (see step 19):http://www.terabyteunlimited.com/kb/article.php?id=279

> I then re-installed BIBM and added Ubuntu to the boot menu. I selected the Linux> partition and the Root volume in the boot menu options for Ubuntu.> > When I boot, the boot menu shows Ubuntu, but it says the volume is not bootable. > > How do I fix this?

Since you just installed, the easiest would be to just reinstall Ubuntu by following the procedure in the KB article linked above. While it's more tedious to do, you can also fix the problem by manually reinstalling Grub2, as covered in this KB article:http://www.terabyteunlimited.com/kb/article.php?id=408